Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
27,576 
I hope someone can help me prove one of De Morgan's Law:
(A intersection B)' = A' U B'

Aug2711 08:43 PM
phinds

14 
128,991 
What are the advantages of using the absolute mean deviation over the standard deviation. Is it possible to show a...

Sep111 12:28 AM
Twinbee

3 
16,264 
Suppose we have a directed acyclic graph. The nodes are labeled with integers (which may be negative). Imagine that...

Aug2511 12:30 AM
mXSCNT

3 
1,488 
When we refer to terms in an equation, what EXACTLY are we referring to? Suppose for example we have:
ab + bc + cd...

Aug2211 02:42 PM
alexfloo

4 
1,982 
Hello,
I have sample of ~280 measurements. Some are replicates and some are not. I want to remove the...

Aug2411 09:35 PM
Stephen Tashi

1 
1,643 
Hi, I'm new to these forums so please redirect me if I've posted this in the wrong place.
I'm trying to graduate and...

Aug3111 09:57 PM
solakis

4 
4,053 
Suppose you have a set of digits, for the sake of simplicity we'll make them binary, how would you determine the...

Aug2111 07:39 PM
Hurkyl

3 
2,196 
The Markov chain, as you know, is a sequence of random variables with the property that any two terms of the sequence...

Aug2111 06:50 PM
alexfloo

1 
761 
Hi everyone!
I have a question on how to compare two distributions. I'm currently a 2nd year biology grad student,...

Aug2311 12:22 AM
Stephen Tashi

12 
4,792 
Dear everyone,
consider a function f(x) of a random variable x with average m and probability distribution p(x).
...

Aug2311 02:30 PM
alexfloo

2 
1,166 
I've never been exposed to this axiom schemata of replacement before, so here's my understanding of it: the axiom...

Aug2311 03:30 PM
Hurkyl

1 
983 
I was reading this up on Wiki so I'll just give a quick overview and then ask my question.
Let \cal{S} be an...

Aug2511 11:16 PM
Kevin_Axion

2 
1,168 
Being a hobbiest programmer, I know enough about probability to get by. However, I've set myself an impossible (for...

Aug2711 06:14 AM
lyric

4 
1,326 
Hi,
For a measurement setup I'm designing, I have to position two sensors which have to be placed at an angle...

Aug2411 09:48 AM
Stephen Tashi

1 
892 
The two events A and B have probabilities 0.2 and 0.4. Also P(A intersect B) = 0.08.
(a) Are the two events A and...

Aug2611 05:00 AM
SW VandeCarr

1 
1,419 
Along 14 separate sections of highway measurements of trac volume (x) and rate of
accidents (y) were taken.
x;...

Aug2611 09:51 AM
Stephen Tashi

4 
2,238 
 Sanders: Statistics: A First Course, 5th ed., § 7.2, p. 236.
Why? The data has not been changed. What difference...

Aug2811 02:02 PM
Stephen Tashi

14 
2,561 
What is the difference between sigma algebra and topological space topological space?also what is the meaning of...

Aug2511 09:52 AM
Rasalhague

2 
2,099 
Firstly, I would like to say that I am an applied physics major, so my knowledge on probability not relating to...

Aug2511 04:35 PM
mhyuen

2 
749 
Does anyone happen to know what the cardinality of the set of ordinal number (transfinite and otherwise) is? A...

Aug2711 09:06 AM
AlephOmega

4 
1,937 
From Koosis, I pieced together the following algorithm.
Is sigma known?
Yes? Then calculate the exact confidence...

Aug2711 03:35 PM
I like Serena

1 
1,184 
Hi. I have a proof of a very basic measure theory theorem related to the definition of a measure, and would like to...

Aug2611 02:15 PM
micromass

4 
1,467 
Hello!
I need your help. I’m really terrible at statistics, probability, permutations, and combinations. I’ve looked...

Aug2711 06:21 PM
exdejesus

6 
2,014 
Hi
By some googling it seems like there exist some kind of expansion of the Taylor series for statistical...

Aug2611 03:57 PM
Stephen Tashi

1 
1,395 
I need to verify this identity:
(A\B)\DeltaC = (A\DeltaC)\Delta(A\bigcapB)
(with delta standing for the...

Aug2711 07:19 PM
autre

3 
975 
Hi everyone,
This is not a homework question. I just want to understand an aspect of linear regression better. ...

Aug2711 11:50 PM
Stephen Tashi

3 
2,294 
I am working with some wind speed data and need to work out the standard deviation of the magnitude of the horizontal...

Aug3011 03:47 PM
Stephen Tashi

5 
2,525 
Hi all
I'm having a bit of trouble trying to calculate the Upper and Lower Control Limit on R chart.
The file...

Aug2811 11:42 PM
Apple&Orange

0 
753 
Hi all,
I'm considering a problem of a bunch of particles (say electrons) arriving on a plate. If the plate is...

Aug3111 10:15 AM
Stephen Tashi

10 
1,450 
I have 2x10^12 unique sequences of DNA, and I have an average of 47 copies of each sequence (so 94x10^12 DNA molecules...

Aug3111 03:30 AM
bpet

1 
1,168 
My question involves supremums and their implications:
say I have the sequences \left\{x_{k}\right\}_{k=1}^{\infty}...

Sep111 08:19 PM
solakis

2 
1,398 
Suppose a vector X of length n, where each component of X is normally distributed with mean 0 and variance 1, and...

Aug3111 06:19 AM
bpet

3 
1,093 
Hi everyone,
This is not a homework question but something I thought of while reading.
In the method of...

Aug3111 07:15 PM
CantorSet

3 
1,394 
So I took probability last year, and for one of my classes we have an optional refresher worksheet, but I cannot...

Aug2911 10:53 PM
I like Serena

1 
1,049 
I read about the differences between Ipv4 and Ipv6, regarding address size.
Ipv4 = address size of 32 bits
Ipv6 =...

Aug3011 05:15 AM
chiro

1 
1,353 
Welcome
Using MLE I found that estimator \alpha parametr from Rayleigh distribution is described by formula ...

Aug3111 02:56 AM
bpet

1 
1,395 
Hello all,
I wonder if anybody knows of a way of generating a random normal vector (i.e. a variate from a...

Sep211 12:39 AM
mockle

4 
1,248 
Hi, I'm having a little trouble understand the idea of closure as so many places seem to describe it differently.
...

Sep111 01:43 PM
JimmyK

0 
850 
Hello. I am wondering if the distributivity theorem works for factoring out more than a single term.
...

Sep111 05:26 PM
SpaceDomain

5 
1,177 
I've never had a basic probability course before, so I've only been able to get my hands on a few materials relating...

Sep211 02:39 AM
chiro

3 
1,081 